The cache is not at the given co-ordinates, but is easily found when the following calculation is done. Note the age limit hence the type of puzzle.
The cache is just above the eyeline of Martha when she stands at her burglar bars as she often does almost starkers! Not shy at all!
Please do not "touch the goods", the cache is not there...
So, where would you find the following object? Get the word values, but ignore any possible non-alphabetic characters:

Do the following calculation to find Martha...
S25 43.(No. 1 + No. 4 digit 2)(No.4 digit 1)(No. 7 digit 2)
E028 10.(No. 2 / 3)(Sum of numbers digit 1)(Summed to one digit – 3)
Note that the property owner has given permission for the placement and actually placed the cache, will probably be joining the world of Geocaching too, thanks Martha (not the same Martha by the way!)